magazines and books can be printed differently, which may have impact on the scans.
If your scan software has different settings, you can try a few and see which setting gives the best result. Not that it's really necessary, your scans look good.

300 dpi is the perfect scan resolution imo, no need to change is.

This version is half the file size of yours:

If you can't see the difference I would suggest changing the quality setting to 80%, this will greatly reduce the file size.

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Feel free to post my scans to the relevant model threads, but do give credit